How about a feat for DnD 5e?
Light Armor Mastery
prerequisite: Proficiency with light armor
You dance like the wind in light armor, gaining the following benefits.
- Increase your dexterity or strength score by 1, to a maximum of 20
- Increase your movement speed by 10 feet
- When you take damage from a melee attack, you can disengage as a reaction.